Kemija - 2017. jesen, 7.

A. $\text{Mg}\backslash text\{Mg\}$  

B. ${\mathrm{M}\mathrm{g}}^{2+}\backslash mathrm\{Mg\}^\{2+\}$

C. $\text{S}\backslash text\{S\}$

D. ${\mathrm{S}}^{2-}\backslash mathrm\{S\}^\{2-\}$